ABSTRACT
The purpose of this study is to show the kinetic effect on the stop-jump movement in wearing overlap length change of the knee joint supporter. Ten young health males volunteered as subjects for this study. Three-dimensional videographic and ground reaction force data in a stop-jump task were collected in three conditions. Overlap length of supporter, peak ground reaction force, peak knee flexion angle, peak knee extension torque at landing, peak jump height, peak jump velocity at takeoff were compared among conditions: high pressure condition, middle pressure condition and no supporter. The high pressure condition significantly increased peak knee flexion angle and peak knee extension torque at landing. It is considered that the high pressure condition enlarged the knee joint angle and the knee joint extension torque in stop task because the rigidity of the supporter increased. On the other hand, it was suggested that the pressure change of wearing the knee joint supporter don’t affect jump performance.